Oil burner with vaporizing type pilot



4 zmszss 1946- J. L. BREESE OIL BURNER WITH VAPORIZING TYPE PILOT Filed Jan. 13, 1944 Patented Jan. 22, 1946 2,393,233 on. BURNER wmr VAPORIZING mu 1 rnio'r James L. Breese, Santa Fe, N. Men, aasignor. to

Oil Devices, Santa Fe, N. Mom, a limited partnership of Illinois Application January 13, 1944, Serial No. 518,045 4 Claims. (e1. 158-91) My invention relates to an improvement in liquid fuel burners and has for one purpose to provide an improved pilot light for such burners.

Another purpose is to provide an improved pilot light of the generator or vaporizing chamber type.

Another purpose is to provide meansfor Boverning the supply of fuel to such'a pilot light.

Another purpose is to provide unitary means for controlling the flow of fuel to a pot type bumer and for controlling a separate flow of fuel to a pilot light for such burner.

Other purposes will appear from time to time throughout the specification.

My invention is illustrated more or less diagrammatically in the accompanying drawing, wherein- Figure 1 i a vertical section;

Figure 2 is a partial section along the line 2-2 of Figure 1.

Like parts are indicated by like characters throughout the specification and drawing.

Referring to the drawing, i generally indicates a burner pot having a bottom 2 and a top flange t surrounding the open mouth of the pot. The flange 3 is shown as resting on an angle ring t within an outside housing 5. The upper portion t of the outside housing 5 may serve to enclose or form a combustion chamber or radiating element. Any suitable means not herein shown may be employed for supporting the burner. l is a centrally apertured flame ring partially closing the otherwise open top of the pot. a is a fuel chamber connected to any suitable source of liquid fuel by a fuel pipe 9. The chamber is provided with a removable cover it. it is a fuel pipe extending from the bottom of the float chamber t to the fitting it which in turn is in communication with the interior of the pot i. Thus fuel from the float chambe 8 flows along the pipe ii and out upon the bottom 2 of the pot, where the liquid fuel is vaporized by the heat of combustion in or above the pot. Air for combustion is provided by a plurality of primary air inlets it arranged circumferentially about the pot I and located at various distances above the bottom of the pot. In practice and assuming that the burner is burning at high fire, the primary air admitted through the air inlets it, forms with the vaporized fuel, a primary mixture which rises in the pot. It receives a secondary supply of air through a plurality of secondary air inlets it, herein shown as arranged in a single row about the top of the not i and as having upwardly and inwardly inclined axes which converge toward the center of the wt. Any suitable means may be employed for manually controlling the supply of fuel which flows along the pipe ii. I illustrate a manual control element in which may control any suitable valve not herein shown for varying the rate of flow of fuel from the float chamber 8 to the Dot I.

it is a vaporizing chamber which may be secured to the pot I, for example by the bracket ll and the screws it. It is aligned with an aperture it in the pot i, through which extends an inlet duct 2t, the interior of which is in communication with the interior of the chamber element it. I find it advantageous to shape the inlet duct 28 in such fashion as to cause it to direct the pilot flame downwardly toward the bottom of the not at an area adjacent the entry of fuel on the pot bottom from the fitting i2. The interior of the chamber it is connected with the interior of the float chamber a adjacent the bottom of both elements, by a fuel pipe 2 i The level of the fuel in the chambers 8 and it may be controlled by a float 22 which is associated with a bell crank lever 23, 2d, the upper arm 2d of which presses against a horizontally axised valve element 25 which is normally urged toward the open position by a circumferential spring 26 within the bore 27 of the member 28. 29 is a spring abutment on the valve element 25 and 30 indicates a valve seat surrounding an inlet passage it in communication with the fuel pipe 9.

It will be understood that as the level of the fuel in the float chamber t drops, the float lowers and permits the spring 26 to move the valve 25 toward the open position A rise in the liquid level has the opposite effect. A local combustion at the level of the fuel is maintained in the chamher it, in order to maintain a pilot flame. I lllustrate a fixed outer sleeve 35 having an open top and an open bottom extending downwardly into the fuel, through the top of the chamber it.

, The sleeve is is shown as having longitudinally extending slots 35 which extend both above and below the level of the fuel. It will be understood that the level of the fuel is maintained to prevent any spillage of liquid fuel through the nozzle or inlet duct it.

ii is a rotatable inner sleeve, shown as open at top and bottom and as having longitudinal slots at which also extend above and below the level of the fuel. 39 is any suitable member which serves both to limit the downward movement of the sleeve 37 in the sleeve 35 and for its ready rotation. The structure constitutes a variable air supply means, as air flows down through the open top and interior of the sleeve t7, and the rate of flow is governed by the rotation of the inner sleeve 37? to vary the air supply passing through the slots 96 and 38. The inner sleeve 31 may be rotated from fully open to fully closed position or may be set at any desired intermediate position.

It will be realized that whereas I have shown and described an operative device, still many changes in size. shape, number and disposition of parts may be made without departing materially from the spirit of my invention, and I wish, therefore, that my showing be taken as in a broad sense diagrammatic.

The use and operation of my invention are as follows:

In hydroxylating pot type burners of the type herein shown, liquid fuel is admitted to the pot, is vaporized by the heat of combustion, receives a primary air supply to produce an incomplete mixture, and is finally burned upon receiving a secondary air supply which completes a fully combustible mixture. The fuel for normal pot combustion is supplied along the pipe I I and its rate of flow is governed by rotation of the manual control member I5. The liquid fuel flows out upon the bottom 2 of the pot and is there vaporized. As the vaporized fuel rises, it receives primary air through the apertures l3 and secondary air through the apertures 14. It will be understood that the particular pot herein shown is not of itself part of the present invention and is employed as an illustration of a practical structure for use with the pilot and fuel control means herein shown.

The liquid fuel vaporizing chamber 16 is employed to maintain a pilot flame. Combustion is maintained in the chamber I6 at the level of the fuel in order to create sufllcient heat to vaporize some of the liquid fuel in the vaporizing chamber. This vaporized fuel, mixing with the air admitted through the sleeve 31 and the slots 36 and 38, supports a flame which flows downwardly into the pot through the nozzle 20. This jet of flame maintains the pot bottom heated locally in the line of inflow of the fuel from the fitting l2. The rate of combustion can be controlled by varying the air supply through the inner tube or sleeve 31. This variation i obtained by rotating the tube to vary the efiective Openings provided by the slots 38 and 38, the two tubes acting together as a shutter or valve assembly.

I claim:

1. In combination, a vertically axised burner pot having a closed bottom wall, a circumferential side wall and an open top, said circumferential side wall having therein a plurality of primary air inlets spaced circumferentially around the pot and located at various distances from the ends of the pot, means for admitting a secondary air supply adjacent the top of the pot, means for delivering liquid fuel to the interior of the pot for vaporization therein, and an exterior pilot chamber for said pot, the interior of said pilot chamber and said pot being in communication at a level adjacent the level of the lowest of said primary air inlet apertures but above the bottom of the pot, means for delivering liquid fuel to the interior of said pilot chamber for vaporization therein, and means for delivering to the-interior of said pilot chamber a controllable air supply.

2. In combination, a vertically axised burner pot having a closed bottom wall, a circumferential side wall and an opentop, said circumferential side wall having therein a plurality of primary air inlets spaced circumferentially around the pot and located at various distances from the ends of the pot, means for admitting a secondary air supply adiacent the top of the pot, means for delivering liquid fuel to the interior of thepot for vaporization therein, and an exterior pilot chamber for said pot, the interior of said pilot chamber and said pot being in communication at a level adjacent the level of the lowest of said primary air inlet apertures but above the bottom of the pot, means for delivering liquid fuel to the interior of said pilot chamber for vaporization therein, and means for delivering to the interior of said pilot chamber a controllable air supply, the level of liquid fuel in the pilot chamher being substantially above the level of liquid fuel in the bottom of the burner pot.

3. In combination, a vertically axised burner pot having a closed bottom wall, a circumferential side wall and an open top, said circumferentiai side wall having therein a plurality of primary air inlets spaced circumferentially around the pot and located at various distances from the ends of the pot, means for admitting a secondary air supply adjacent the top of the pot, means for delivering liquid fuel to the interior of the pot for vaporization therein, and an exterior pilot chamber for said pot, the side wall of said not being apertured for communication with the interlor of said pilot chamber, a tubular deflector member extending through said aperture, from an upper part of said pilot chamber downwardly into the interior of the pot, said tubular member having a flame discharge orifice located at a level adjacent the level of the lowest of said primary air inlet apertures, but above the bottom of the pot, means for delivering liquid fuel to the interior of said pilot chamber for vaporization therein, and means for delivering to the interior of said pilot chamber a controllable air supply.

4. In combination, a vertically axised burner pot having a closed bottom wall, a circumferential side wall and an open top, said circumferential side wall having therein a. plurality of primary air inlets spaced circumferentially around the pot and located at various distances from the ends of the pot, means for admitting a secondary air supply adjacent the top of the pot, means for delivering liquid fuel to the interior of the pot for vaporization therein, and an exterior pilot chamber for said pot, the side wall of said pot being apertured for communication with the interior of said pilot chamber, a tubular deflector member extending through said aperture, from an upper part of said pilot chamber downwardly into the interior of the pot, said tubular member having a flame discharge orifice located at a level adjacent the level of the lowest of said primary air inlet apertures, but above the bottom of the pot, means for delivering liquid fuel to the interior of said pilot chamber for vaporization therein, and means for delivering to the interior of said pilot chamber a controllable air supply, the level'of liquid fuel in the pilot chamber being substantially above the level of liquid fuel in the bottom of the burner pot.

JAMES L. BREESE. 

